Are Peptides Good for Eczema-Prone Skin?

Peptides have become increasingly popular in skincare, appearing in everything from anti-ageing serums to moisturisers designed to support healthier-looking skin. Often promoted for their potential to improve skin firmness, hydration and repair, these ingredients have attracted attention for their possible benefits beyond cosmetic skincare.

But what about people with eczema-prone skin? Could peptides help strengthen the skin barrier, reduce dryness or improve some of the symptoms associated with eczema?

Eczema is a common inflammatory skin condition that can leave the skin feeling dry, itchy, irritated and sensitive. Because the skin barrier is often compromised, choosing suitable skincare products can be particularly important.

What are peptides in skincare?

Peptides are short chains of amino acids, which are the building blocks of proteins.

Our bodies naturally contain many different peptides, each with its own biological functions. Some act as signalling molecules, helping cells communicate with one another, while others are involved in processes such as hormone regulation and tissue maintenance.

In skincare, peptides are commonly included in serums, creams and moisturisers because of their potential effects on skin appearance and function.

Different types of skincare peptides are designed or investigated for different purposes. For example:

• Signal peptides: Studied for their potential to influence processes involved in collagen production and skin maintenance.

• Carrier peptides: Help transport certain substances, such as copper, which plays a role in biological processes associated with skin health.

• Neurotransmitter-inhibiting peptides: Commonly used in anti-ageing skincare products targeting the appearance of expression lines.

It's also important to distinguish topical skincare peptides from prescription peptide medicines and experimental injectable peptides. These products have different purposes, mechanisms and safety considerations.

Understanding eczema and the skin barrier

Before exploring whether peptides could help eczema-prone skin, it's useful to understand what happens to the skin when someone has eczema.

Eczema, particularly atopic dermatitis, is a chronic inflammatory skin condition associated with changes in the skin's protective barrier and immune system.

The skin barrier is the outermost protective layer of the skin. It helps retain moisture while limiting the entry of environmental irritants, allergens and microorganisms.

In people with eczema, this barrier may not function as effectively as it should. As a result, the skin can lose moisture more easily and become more vulnerable to irritation.

Common symptoms include:

• Dry, rough or flaky skin

• Persistent itching

• Redness or other changes in skin colour

• Inflamed or irritated patches

• Cracking, weeping or thickening of the skin in some cases

Several factors can contribute to eczema, including genetics, immune system activity and environmental triggers.

For example, some people with atopic dermatitis have changes affecting filaggrin, a protein important for maintaining the skin barrier. When the barrier is weakened, moisture escapes more easily through a process known as transepidermal water loss (TEWL).

This can contribute to a cycle of dryness, itching and scratching, which may further damage the skin.

Read related article: Is Your Dry Skin a Sign of a Vitamin Deficiency?

What does the research say about peptides and eczema?

Although peptides have been widely studied in cosmetic skincare, research specifically examining their effectiveness for eczema remains limited.

One important distinction is that many studies focus on skin appearance, hydration or laboratory markers rather than improvements in eczema symptoms, however, a small number of clinical studies have investigated peptide-containing products in people with atopic dermatitis.

A clinical study on peptide-containing moisturisers

A study published in the Journal of Dermatological Treatment investigated whether a moisturiser containing a peptide called pentasodium tetracarboxymethyl palmitoyl dipeptide-12 (PTPD-12) could benefit people with mild-to-moderate atopic dermatitis.

The randomised, double-blind, placebo-controlled trial involved 43 participants.

Over four weeks, researchers evaluated several measures, including:

• Eczema severity

• Skin hydration

• Transepidermal water loss

• Itching

• Overall skin condition

Participants using the peptide-containing moisturiser experienced improvements in several measures compared with their starting measurements.

The researchers, however, found that the differences in improvement between the peptide-containing moisturiser and the control moisturiser were not statistically significant.

This is an important limitation because although the findings suggest that the formulation may have supported skin hydration and barrier function, the study did not establish that adding the peptide provided a meaningful advantage over the control moisturiser.

What about other skincare peptides?

Other commonly discussed skincare peptides include copper peptides, such as GHK-Cu, and signal peptides used in anti-ageing formulations.

Some have been investigated for their potential effects on skin appearance and repair. For example, a 2005 clinical study found that a moisturiser containing palmitoyl pentapeptide improved the appearance of fine lines and wrinkles, while a 2018 scientific review discussed laboratory and animal research suggesting that GHK-Cu may influence collagen production and wound healing.

However, research showing potential cosmetic or laboratory benefits does not establish that these ingredients can treat eczema.

For example, a peptide that improves the appearance of wrinkles in a cosmetic study may not necessarily reduce itching, inflammation or eczema flare-ups.

These are different outcomes that require different types of clinical research.

Can peptides replace conventional eczema treatments?

At present, cosmetic skincare peptides are not considered established treatments for eczema.

Although certain peptides are being investigated for their potential skin benefits, they should not replace treatments recommended by a healthcare professional.

Evidence-based approaches to managing atopic dermatitis include regular moisturiser use and, when appropriate, prescription treatments that address inflammation. These may include topical corticosteroids, topical calcineurin inhibitors and other treatments selected according to eczema severity and individual needs.

For more severe eczema, a dermatologist may recommend additional treatment options.

It's also worth remembering that moisturising the skin and treating inflammation serve different purposes. A moisturiser can help reduce dryness and support the skin barrier, but it may not adequately control inflammation during an eczema flare-up.

Read related article: The Right Way to Moisturise Eczema-Prone Skin (and What to Avoid)

What should you look for in skincare products for eczema-prone skin?

If you have eczema-prone skin, choosing products that support moisture retention and minimise irritation is generally more important than focusing on trending skincare ingredients.

Here are several things to consider.

1. Fragrance-free formulations

Fragrances can be a source of irritation or allergic contact dermatitis for some people with eczema.

Choosing fragrance-free products may help reduce exposure to unnecessary potential irritants. Keep in mind that products labelled unscented may still contain ingredients used to mask odours.

2. Moisturising ingredients

Ingredients such as glycerin, petrolatum and ceramides are commonly used in moisturising products. They work in different ways to attract moisture, reduce water loss or support the skin's protective barrier.

For people with eczema, a moisturiser that is comfortable to use consistently is often more valuable than a product containing numerous specialised ingredients.

3. Gentle cleansers

Harsh soaps and cleansers can contribute to dryness and irritation. Consider gentle, fragrance-free cleansing products and avoid washing with excessively hot water.

After bathing or showering, applying moisturiser while the skin is still slightly damp can help support hydration.

4. Simple skincare routines

Using too many products can make it harder to identify which ingredients are causing irritation.

A simple routine consisting of a suitable cleanser, moisturiser and any prescribed eczema treatment may be easier to maintain. Additional products, including peptide serums, should be considered optional rather than essential.

5. Products suited to your individual skin needs

Eczema varies considerably from person to person. Some individuals experience mild, occasional dryness, while others have persistent inflammation requiring ongoing medical management.

If you're uncertain about a skincare ingredient or frequently experience reactions, speak with a qualified healthcare professional before introducing it.

So, are peptides worth considering for eczema-prone skin?

Peptides are an interesting area of skincare research, with certain ingredients being investigated for their potential effects on skin hydration, barrier function and repair.

However, when it comes to eczema, the scientific evidence remains limited.

While some early studies have examined peptide-containing moisturisers in people with atopic dermatitis, there is not enough evidence to conclude that cosmetic peptides are effective eczema treatments or that they consistently provide benefits beyond conventional moisturisers.

For people with eczema-prone skin, the priority should remain a gentle skincare routine, regular moisturising and appropriate medical treatment when needed.

Peptide-containing skincare products may be worth discussing with a healthcare professional, but they should be viewed as optional additions rather than replacements for established eczema care.

Disclaimer: This article is intended for general educational purposes only and does not constitute medical advice. If you have eczema or another persistent skin condition, consult a qualified healthcare professional for advice on suitable skincare products and treatment options.

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